Question

Sa se rezolve acuatia:
$2 ^{x+2} + 2^{x} - 10=0$

Answer 1

$2^{x+2}+2^x=10 \\ \\ 2^x\cdot4+2^x=10 \\ \\ 2^x\cdot5=10 \\ \\ 2^x=2 \\ \\ x=1$

Answer 2

Notam  2ˣ=y
4y+y=10
5y=10
y=10/5
y=2 ⇒2ˣ = 2 ⇒ x=1